CN215645111U - Torque-limited self-coupling full-neutral butt joint device - Google Patents

Abstract

The utility model relates to a torque-limited self-coupling all-neutral butt joint device, which comprises a coupling part and a driving part, wherein the coupling part is fixed on a base plate, the driving part provides power for circumferential motion for the coupling part, a pin ring assembled on the periphery of the coupling part converts the circumferential motion of the coupling part into axial movement, and the driving part comprises a driving motor, a driving gear assembled on an output shaft of the driving motor, a driven gear meshed with the driving gear and a worm connected with the driven gear through a transmission shaft; the driven gear is sleeved on the transmission shaft and synchronously rotates with the transmission shaft within a limited torque range through a torque limiting connecting device. The torque-limiting connecting device additionally arranged in the utility model not only can provide protection for the motor to prevent rotation blockage, but also eliminates the accumulated error caused by each locking and separating action of the two butt-joint devices by a method that the rotation angle is larger than the advancing angle.

Description

Torque-limited self-coupling full-neutral butt joint device

Technical Field

The utility model belongs to the technical field of connectors, and particularly relates to a torque-limiting self-coupling all-neutral butt joint device.

Background

With the development of space technology, the iteration speed of satellite functions is accelerated and the like, a disposable mode adopted by the traditional spacecraft is capable of being replaced and upgraded only by a mode of re-launching, so that a large amount of resources are wasted, the newly launched satellite needs to have the functions of on-orbit maintenance, service life prolonging, upgrading and expanding and the like, and the on-orbit maintenance and function expanding of the spacecraft are realized by depending on equipment miniaturization and modular design.

The novel satellite allows a plurality of modular satellites to be built in a building block building mode, the modular satellite is assumed to be a cube, a docking device can be installed in the center of each of six faces of the modular satellite, and fixing and transmission of light, fluid and electric power are achieved among any plurality of modular satellites through the docking device.

The existing common butt joint device can only meet the butt joint of two modularized satellites, or a plurality of modularized satellites are connected in series front and back, and the requirement of outward superposition along each face cannot be met. The coupling device CN106163926 only illustrates the docking fixing manner of the two devices, and the transmission mechanism and the medium transmission aspect are not further described.

Disclosure of Invention

The utility model provides a torque-limited self-coupling full-neutral butt joint device with a novel structure, which is characterized in that a torque-limited connecting device is arranged on a driving part, so that the driving force of the driving part is limited in a certain range, and the motor is prevented from being locked due to overlarge load.

The purpose of the utility model and the technical problem to be solved are realized by adopting the following technical scheme. The utility model provides a torque-limiting self-coupling all-neutral butt joint device which comprises a coupling part and a driving part, wherein the coupling part and the driving part are fixed on a base plate, the driving part provides power for circumferential motion for the coupling part, a pin ring assembled on the periphery of the coupling part converts the circumferential motion of the coupling part into axial movement, and the driving part comprises a driving motor, a driving gear assembled on an output shaft of the driving motor, a driven gear meshed with the driving gear and a worm connected with the driven gear through a transmission shaft; the driven gear is sleeved on the transmission shaft and synchronously rotates with the transmission shaft within a limited torque range through a torque limiting connecting device.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

In the torque-limiting self-coupling all-neutral butt joint device, a plurality of through grooves extending along the radial direction are axially distributed on the driven gear, and the periphery of the transmission shaft is provided with corresponding grooves; the torque-limiting connecting device comprises a set screw, an elastic piece and a ball, wherein the set screw, the elastic piece and the ball are assembled in the through groove, the bottom of the ball is embedded in the groove in the transmission shaft, and the elastic piece provides pretightening force for the ball under the action of the set screw.

In the self-coupling full-neutral butt joint device for limiting torque, the through groove is located on a fixed block fixed at one end of the driven gear.

According to the self-coupling full-neutral butt joint device for the limited torque, the fixing block is circumferentially provided with the plurality of protrusions, and the through groove is located on the protrusions so as to meet the assembly requirement of the limited torque connecting device.

In the torque-limiting self-coupling all-neutral docking device, the substrate is further fixed with a communication component, and a through hole is formed in a part of the upper end of the communication component, which covers the coupling component; the front end of the conductive pin is inserted into the through hole at the upper end of the communication part of the other butt joint device to realize the conduction of the communication part when the butt joint device is connected with the other identical butt joint device.

The conductive pin comprises a conductor and an insulator partially wrapping the periphery of the conductor, the absence of the insulator at the position of the peripheral part of the conductor enables the periphery of the conductor to have a first conductive potential and a second conductive potential which are distributed at intervals along the axial direction, and when the two butting devices are connected in place, the first conductive potential and the second conductive potential are respectively positioned in the through hole of the communication part of the two butting devices and are in contact conduction with the through hole.

When the two docking devices are docked in place, the conductive pin on any docking device can be in contact conduction with the contact cavity on the bus bar at different ends through the first conductive potential and the second conductive potential.

In the torque-limiting self-coupling all-neutral docking device, the communication component further includes a fixing plate for fixing the upper end of the bus bar, and the fixing plate is supported above the first coupling element and has a positioning hole corresponding to the contact cavity on the bus bar for the conductive pin to pass through.

The communication unit further comprises a locking trigger device which is positioned at the bottom of the fixed disk and can send a signal for starting locking under the pushing of a guide pin on the other docking device.

In the torque-limiting self-coupling all-neutral docking device, the locking trigger device includes a positioning plate fixed on the fixed disk, and a first conductive plate and a second conductive plate fixedly assembled on the positioning plate, and the positioning plate is further provided with a trigger hole communicated with the first conductive plate; the connecting conductor which is assembled between the first conducting strip and the second conducting strip in a sliding way is provided with a conducting position and a separating position in the sliding process, when the connecting conductor is positioned at the conducting position, the connecting conductor is simultaneously contacted and conducted with the first conducting strip and the second conducting strip, when the connecting conductor is positioned at the separating position, the front end of the connecting conductor is separated and disconnected from the second conducting strip, and the rear end of the connecting conductor penetrates through the first conducting strip and extends into the trigger hole; the positioning plate is also provided with an elastic piece which enables the connecting conductor to be kept at a separation position, and the front end of the guide pin/the guide pin on the other butt joint device is inserted into the trigger hole to provide force for the connecting conductor to move from the separation position to the conduction position.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. By means of the technical scheme, the utility model can achieve considerable technical progress and practicability, has wide industrial utilization value and at least has the following advantages: the torque-limiting connecting device additionally arranged in the utility model not only can provide protection for the motor to prevent rotation blockage, but also eliminates the accumulated error caused by each locking and separating action of the two butt-joint devices by a method that the rotation angle is larger than the advancing angle.

Drawings

FIG. 1 is a schematic structural view of a torque limited self-coupling all-neutral docking assembly of the present invention;

FIG. 2 is another schematic view of the torque limited self-coupling fully neutral docking station of the present invention;

FIG. 3 is a schematic diagram of the coupling components of the torque limited self-coupling all-neutral docking apparatus of the present invention;

FIG. 4 is an exploded view of FIG. 3 with spur gears omitted;

FIG. 5 is a schematic view of the driving portion of the torque limited self-coupling fully neutral docking device of the present invention;

FIG. 6 is a schematic view of the driven gear of the torque limited self-coupling fully neutral docking device of the present invention;

FIG. 7 is a schematic view of the torque-limiting self-coupling all-neutral docking device of the present invention;

FIG. 8 is a cross-sectional view of the torque limiting self-coupling fully neutral docking device gearing structure of the present invention;

FIG. 9 is a schematic diagram of a pin ring configuration for a torque limited self-coupling all neutral docking assembly in accordance with the present invention;

FIG. 10 is a cross-sectional view of the conductive pin of the torque limiting self-coupling all neutral docking assembly of the present invention;

FIG. 11 is a schematic diagram of the communication components of the torque limited self-coupling all neutral docking apparatus of the present invention;

FIG. 12 is an exploded view of FIG. 11;

FIG. 13 is a view of the assembled relationship of the communication components and the pin ring;

FIG. 14 is a schematic diagram of a cover plate configuration of the torque limiting self-coupling all-neutral docking assembly of the present invention;

FIG. 15 is a schematic structural view of a torque limited self-coupling all-neutral docking device locking trigger of the present invention;

FIG. 16 is a cross-sectional view of FIG. 15;

FIG. 17 is a schematic view of a positioning seat structure of the locking trigger device;

FIG. 18 is a schematic view of the engagement of the lock trigger device with the guide pin at the opposite end;

FIG. 19 is a cross-sectional view of FIG. 18;

FIG. 20 is a schematic illustration of a torque limited self-coupling all neutral docking assembly with the current pin pre-engaged;

FIG. 21 is a schematic diagram of the torque limiting self-coupling fully neutral docking device with the current conducting pin inserted in place.

[ description of main element symbols ]

1 coupling part

11: first coupling element

111: spur gear

112: guide pin

113: a first guide path

114: second guide path

115: first engaging element

12: second coupling element

121: pin hole

122: second engaging element

13: linear guide structure for sleeve

2: driving part

21: driving motor

22: driving gear

23: driven gear

24: transmission shaft

241: step surface

242: check ring

25: worm screw

26: torque-limiting connecting device

261: groove

262: through groove

263: elastic piece

264: ball bearing

265: fastening screw

3: communication component

31: fixed disk

311: locating hole

312: guide hole

32: bus bar

321: tabletting

322: contact chamber

33: inclined ring spring

34: locking trigger device

341: positioning plate

3411: guide groove

342: connecting conductor

3421: tail part

3422: small spring

3423: head part

3424: connecting cap

343: first conductive sheet

344: second conductive sheet

345: big spring

346: trigger hole

35: printed board fixing part

4: pin ring

41: conductive pin

411: conductor

4111: supporting conductor

4112: pin conductor

412: insulator

4121: upper insulating sleeve

4122: lower insulating sleeve

4123: insulating sleeve

4124: insulating guide cone

413: first conductive site

414: second conductive site

42: guide pin

43: ring (C)

44: pin bolt

5: substrate

6: cover plate

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to the embodiments, structures, features and effects of the torque-limited self-coupling all-neutral docking device according to the present invention with reference to the accompanying drawings and preferred embodiments.

Please refer to fig. 1-21, which are schematic structural diagrams of parts of the torque-limiting self-coupling all-neutral docking device of the present invention, the docking device includes a coupling component 1, a driving component 2, a communication component 3, and a pin ring 4, wherein the coupling component 1, the driving component 2, and the communication component 3 are all fixed on a substrate 5, the driving component 2 provides a motion power for the coupling component 1, and the pin ring 4 is assembled on an outer circumference of the coupling component 1 and can convert a circular motion of the coupling component 1 into an up-down motion, that is, when the coupling component 1 is driven by the driving component 2 to rotate, the pin ring 4 can be driven to move up-down. The part of the communication part 3 that overlies the coupling part 1 can be brought into conduction with the butt end communication part by means of conductive pins on the pin ring 4. The communication part 3 is provided with through holes for the pins of the pin ring 4 to pass through. In an embodiment of the utility model, said communication parts 3 are distributed around the periphery of the coupling part 1.

The coupling part 1 comprises a sleeve 13 fixed on the base plate 5, and a second coupling element 12 and a first coupling element 11 movably sleeved on the outer periphery of the sleeve 13 from inside to outside in sequence. Wherein the first coupling element 11 comprises a spur gear 111 fixed on the outer surface of the housing thereof, the spur gear 111 being capable of driving the first coupling element 11 to rotate under the driving of the driving part 2. The housings of the first coupling element 11 and the sleeve 13 are provided with a second guide path 114 in the form of a slot of predetermined profile, guided by which the two ends of the guide pin 112 passing through the pin hole 121 in the second coupling element 12 are located in the second guide paths 114 on the first coupling element 11 and the sleeve 13, respectively. So that the second coupling element 12 can be rotated up and through the communication part 3 into the coupling parts at both ends to achieve coupling of the two or be retracted by lowering under the drive of the first coupling element 11.

A plurality of first engaging elements 115 are arranged at intervals on the inner side of the upper end of the first coupling element 11, and the first engaging elements 115 are uniformly distributed along the inner circumference of the housing of the first coupling element 11. The second coupling element 12 is provided with a plurality of second engaging elements 122 at intervals on the upper periphery, when the butting device is butted and connected with another identical butting device, the second engaging element 122 at one end enters the first coupling element 11 from the gap between the first engaging elements 115 at the other end, and when the second engaging element 122 is rotated and lifted to a proper position, the second engaging element 122 at one end is matched and locked with the first engaging element 115 at the other end.

The outer periphery of the housing of the first coupling element 11 is also provided with a first guide path 113 in the form of a slot of predetermined contour, the pin ring 4 is guided by the first guide path 113 via the pin 44, and when the docking device is docked with the other end, the drive part 2 rotates the spur gear 111, so that the first coupling element 11 rotates, at which point the pin on the pin ring 4 is guided by the first guide path 113 into the corresponding hole in the communication part 3 under the influence of the pin 44 and can continue to move upwards out of the hole. The pin on the pin ring 4 comprises a plurality of conductive pins 41 and guide pins 42, wherein the conductive pins 41 comprise conductors 411 and insulators 412 covering the outer peripheral parts of the conductors 411, and the absence of the insulators 412 at the positions of the outer peripheral parts of the conductors 411 enables the outer peripheries of the conductors to have a first conductive potential 413 and a second conductive potential 414 distributed along the axial direction, when two identical butt-joint devices are in a non-inserted state, the conductive pins 41 are not in contact with the communication parts 3 at the ends thereof, when the two identical butt-joint devices are in an inserted state, the conductive pins 41 are in contact conduction with the communication parts 3 at the ends thereof through the first conductive potentials 413 thereon, and are in contact conduction with the communication parts 3 at the butt-end ends through the second conductive potentials 414 thereon, so that the communication parts at the two butt-end ends are in contact conduction through the conductive pins 41.

In the embodiment of the present invention, the conductor 411 includes a supporting conductor 4111 and a pin conductor 4112 fixedly mounted on the front end of the supporting conductor 4111, and the insulator 412 includes an upper insulating sleeve 4121 sleeved on the rear end of the supporting conductor 4111 to fix the supporting conductor 4111 on the pin ring 4, a lower insulating sleeve 4122 screwed on the tail of the supporting conductor and stopping and limiting the end face of the tail of the upper insulating sleeve 4121, an insulating sleeve 4123 for providing insulating protection to the front end of the supporting conductor 4111, and an insulating guide cone 4124 for providing insulating protection to the front end of the pin conductor. The first conductive potential 413 is an outer peripheral surface of an annular boss located between the upper insulating sleeve 4121 and the insulating sleeve 4123 on the supporting conductor 4111, and front and rear end surfaces of the annular boss are respectively blocked and limited by the upper insulating sleeve 4121 and the insulating sleeve 4123. The second conducting potential 414 is the outer peripheral surface of the large-diameter section in the middle of the pin conductor 4112, the small-diameter section at the front end of the pin conductor 4112 is fixedly assembled with the mounting hole at the rear end of the insulating guide cone 4124, the small-diameter section is in interference assembly with the mounting hole in the insulating guide cone 4124 through the stepped shaft structure with the large front part and the small rear part, and the step of the stepped shaft structure with the small diameter section is an inclined plane. And the small-diameter section at the rear end of the pin conductor 4112 is in threaded connection with the threaded hole at the front end of the support conductor 4111.

In the embodiment of the present invention, since the supporting conductor and the pin conductor constituting the conductive pin 41 are metal conductors and the other parts are insulators, in a non-inserted state, the insulating portion of the conductive pin is in contact with the inclined coil spring and cannot be conducted, and when the conductive pin moves to an inserted position, the conductive portion of the conductive pin is in contact with the inclined coil springs of the bus bars at the two ends, respectively, so as to realize the conduction between the two bus bars of the two docking apparatuses.

The communication part 3 comprises a plurality of bus bars 32 for signal transmission and a fixed disc 31 for realizing the fixation of the upper ends of the bus bars 32, wherein the lower ends of the bus bars 32 are fixed on the substrate 6, the fixed disc 31 is supported above the first coupling element 11 and is provided with a positioning hole 311 for a conductive pin 41 below the fixed disc to pass through and a guide hole 312 for a guide pin 42 to pass through, and one side of each positioning hole 311 is provided with another positioning hole 311 for a conductive pin extending from an abutting end to be inserted from the upper end; one side of each guide hole 312 is provided with another guide hole 312 into which a guide pin protruding from the butt end is inserted.

The bus bar 32 is positioned and assembled on the fixed disk 31 through the matching of the annular contact cavity 322 at the upper end of the bus bar 32 and the positioning hole 311 on the fixed disk 31. When the conductive pin 41 below the fixed disk 31 extends upwards, the upper end of the conductive pin 41 passes through the contact cavity 322 and continues to move upwards, and when the conductive pin 41 moves to the right position, the first conductive potential 413 thereof reliably contacts with the contact cavity 322, so that the conduction with the bus bar is realized; at this time, the two docking units are relatively moved along the inserting direction, so that the conductive pin 41 is inserted into the corresponding positioning hole of the fixed disk of the other docking unit, and when the conductive pin 41 is inserted into the corresponding positioning hole, the second conductive potential 414 of the conductive pin 41 is in contact conduction with the contact cavity of the opposite-insertion-end bus bar. Similarly, the two docking devices can also realize the conduction of the communication components through the conductive pin 41 at the other end, and can also realize the conduction of all the communication components through the conductive pins at the two ends, namely when the docking devices are docked, the conductive pins extending out of one end can be selected to realize the conduction of part of the bus bars according to the requirements, and the conductive pins at the two ends can also be selected to extend out to realize the complete conduction of all the bus bars.

In the embodiment of the present invention, in order to ensure reliable contact between the conductive pin 41 and the bus bar 32, the inclined coil spring 33 made of a conductive material is further fixed in the contact cavity 322, and reliable contact conduction between the conductive pin 41 and the contact cavity 322 of the bus bar is achieved through the inclined coil spring 33. Preferably, the contact cavity 322 is further covered with a pressing plate 321 of an annular structure for preventing the inclined coil spring 33 from coming off, the upper end of the inclined coil spring 321 is stopped and limited by the pressing plate 321, and the lower end is stopped and limited by a stepped surface in the contact cavity 322. Preferably, the pressing piece 321 is a conductor, but is not limited thereto.

In the embodiment of the present invention, the outer side of the upper end of the positioning hole 311 on the fixed disk 31 is provided with an avoiding groove 3111 for facilitating the assembly of the bus bar, and both sides of the avoiding groove 3111 are further extended outward to form a limiting part 3112 for limiting both sides of the bus bar, but the present invention is not limited thereto.

The fixed disc 31 is also covered with a cover plate 6 in a pressing way, and the cover plate 6 is connected with the fixed disc through screws. Corresponding through holes are also formed in the cover plate 6 at positions corresponding to the positioning holes 311 and the guide holes 312 of the fixed disk 31, and an insertion guide structure 61 is arranged at a hole at the upper end of the through hole through which the conductive pin or the guide pin at the other end of the fixed disk passes. In the embodiment of the present invention, the cover plate 6 is fixedly connected to the fixed disk 31 through the groove 62 whose bottom is matched with the fixed disk 31.

The communication unit 3 further comprises a locking trigger 34 fixed to the bottom of the fixed plate 31, which can be triggered by the guide pin 42 at the other end to send a signal to the control part, so that the control part triggers the docking device to activate the driving unit 2 to complete the locking action. The locking trigger device 34 includes a positioning plate 341, and a connecting conductor 342, a first conductive plate 343, a second conductive plate 344 and a large spring 345 fixedly mounted on the positioning plate 341, wherein the connecting conductor 342 is slidably mounted in a guide slot 3411 connecting the first conductive plate 343 and the second conductive plate 344, and a rear end of the connecting conductor 342 is slidably mounted in the first conductive plate 343 and has a protrusion 3431 on an outer periphery thereof for stopping and limiting a front end surface of the first conductive plate 343. The large spring 345 provides a force to the connection conductor 343 away from the second conductive tab 344. The positioning plate 341 is further provided with a triggering hole 346 for inserting the front end of the other end guide pin, and in the embodiment of the present invention, the axial direction of the triggering hole 346 is perpendicular to the guide groove 3411. Under the action of the large spring, the tail of the connecting conductor 342 passes through the sliding slot between the trigger hole 346 and the first conducting plate 343 to enter the trigger hole 346, and can move towards the first conducting plate 343 under the push of the inclined plane at the front end of the guide pin, when the guide pin is inserted in place, the front end of the connecting conductor 342 is in contact conduction with the second conducting plate 344, at the moment, the two conducting plates are in conduction, and the second conducting plate sends a signal to the control part to start locking.

Preferably, the guide groove 3411 is a stepped groove with a small front and a large rear, the large spring is located in the large diameter section of the stepped groove, and one end of the large spring presses on the protrusion 3431 at the outer periphery of the connecting conductor 342, and the other end presses on the stepped surface in the stepped groove.

To sum up, the connection conductor 342 of the present invention has a conducting bit and a separating bit, when the connection conductor 342 is located at the separating bit, the tail thereof extends into the trigger hole 346, and the front end thereof is separated from the second conductive sheet 344; when the conductive strip is at the conducting position, the front end of the connecting conductor 342 is in contact with the second conductive strip 344; the large spring 345 provides the connecting conductor with an elastic force to keep the connecting conductor at the separation position, and the other guide pin inserted into the trigger hole 346 provides the connecting conductor 342 with a power to move from the separation position to the conduction position through the tapered inclined surface at the front end; the connection conductor 342 is always kept in contact with the first conductive plate throughout the entire moving stroke of the connection conductor 342.

In order to ensure that the connecting conductor 342 can move to the conducting position when the guide pin is inserted in place and prevent the front end of the connecting conductor 342 from being damaged due to excessive pressing force, the connecting conductor 342 is an elastic needle which comprises a tail part 3421, a small spring 3422 and a head part 3423, wherein the rear end of the tail part 3421 slides through the first conductive sheet 343 and extends into the trigger hole 346. The tail 3421 has a cavity extending axially at its front end, the head 3423 is press-fitted into the front end of the cavity by a small spring 3422, and the front end of the head protrudes out of the cavity of the tail. When the front end of the head part 3423 is contacted with the second conductive sheet, and the guide pins still push the tail part 3422 to move forward, the small spring 3422 realizes the axial floating of the connection conductor, preventing the head part from being damaged.

Preferably, a cap 3424 is further fixed to the rear end of the tail portion 3421, and the tail portion of the cap 3424 has a smooth arc-shaped surface to achieve smooth contact between the connecting conductor 342 and the tapered surface of the front end of the guide pin.

In the process of oppositely inserting the two butting devices, the guide pin at one end can enter the trigger hole at the other end, the guide pin continuously moves downwards, once the guide pin reaches a specific position, the downward movement of the guide pin can be decomposed into leftward movement for pushing the tail part of the connecting conductor through the conical surface of the guide pin, the head part of the connecting conductor is contacted with the second conducting strip, then the conduction between the two conducting strips is completed, a signal is sent to the control part while the conduction is completed, and the control part triggers the butting devices to start the motor to complete the locking action.

In another embodiment of the present invention, the moving direction of the connecting conductor 343 is the same as the moving direction of the guide pin, at this time, the axial direction of the triggering hole 346 is the same as the moving direction of the connecting conductor 342, at this time, the tail end surface of the coupling cap 3421 at the tail of the connecting conductor 342 is a plane, and the guide pin at the other end pushes the tail end surface of the coupling cap 3424 through the front end surface thereof, so that the connecting conductor 342 moves from the disconnection position to the connection position.

In another embodiment of the present invention, the pins on the pin ring 4 only include the conductive pin 41, the locking trigger 31 is located below the fixed plate and the trigger hole on the locking trigger is located directly below one of the positioning holes, and the conductive pin 41 inserted at the other end provides the power for the connection conductor 342 in the emergency trigger 31 to move from the separation position to the conductive position.

Preferably, the control portion includes a printed board connected and conducted with the first conductive sheet 343 and the second conductive sheet 344, the substrate 5 is provided with a printed board fixing member 35, and the printed board fixing member 35 is further connected with the cover plate 6.

The driving part 2 includes a driving motor 21, a driving gear 22 assembled on an output shaft of the driving motor 21, a driven gear 23 driven by the driving gear, and a worm 25 connected to the driven gear 23 by a transmission shaft 24, wherein the driving motor 21 drives the driving gear 22 to rotate and transmits a rotational force to the worm 25 through the driven gear 23 and the transmission shaft 24, so that the worm 25 can drive the spur gear 111 to rotate. In order to prevent the driving motor 21 from stalling, a torque limiting connecting device 26 is added between the transmission shaft 24 and the driven gear 23, wherein the driven gear 23 is sleeved on the transmission shaft 24 and is connected through the torque limiting connecting device 26, so that the rotation of the transmission shaft and the driven gear is synchronous. Specifically, the front end of the driven gear 23 is in stop fit with a retainer ring 242 assembled on the transmission shaft 24 to realize axial limit, and the rear end of the driven gear 23 is in stop fit with a stepped surface 241 on the transmission shaft 24 to realize axial limit.

The torque-limiting coupling device 26 includes a set screw 265, an elastic member 263 and balls 264, wherein a plurality of grooves 261 for the balls 264 to be inserted are uniformly distributed on the outer circumference of the transmission shaft 24 in the radial direction, and a plurality of through grooves 262 corresponding to the grooves 261 and extending in the radial direction are provided on the driven gear 23. The bottom of the ball 264 is embedded in the groove 261 on the transmission shaft, and the elastic element 263 assembled in the through groove 262 provides moving pre-pressure for the ball 264 under the action of the set screw 265, so that the driven gear 23 can drive the transmission shaft 24 to rotate. When the load at the end of the transmission shaft 24 is too large, and the transmission force between the driven gear 23 and the transmission shaft 24 exceeds a limited torque, the pre-pressure applied to the balls is not enough to enable the driven gear 23 to drive the transmission shaft 24, and at the moment, the slipping function between the driven gear 23 and the transmission shaft 24 can be realized. The torque-limiting connecting device not only can provide protection for the motor to prevent rotation blockage, but also eliminates the accumulated error caused by each locking and separating action of the two butting devices by a method that the rotation angle is larger than the advancing angle.

In the embodiment of the present invention, the through groove 262 is located on a fixed block fixed at one end of the driven gear. Preferably, the fixing block is circumferentially provided with a plurality of protrusions, and the through groove is located on the protrusions to meet the assembly requirement of the torque-limiting connecting device.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. A torque-limiting, self-coupling, all-neutral docking apparatus comprising a coupling member fixed to a base plate and a driving member for providing power to the coupling member for circumferential movement, a pin ring fitted to an outer periphery of the coupling member for converting the circumferential movement of the coupling member into movement in an axial direction, characterized in that: the driving part comprises a driving motor, a driving gear assembled on an output shaft of the driving motor, a driven gear meshed with the driving gear and a worm connected with the driven gear through a transmission shaft; the driven gear is sleeved on the transmission shaft and synchronously rotates with the transmission shaft within a limited torque range through a torque limiting connecting device.

2. The torque-limiting, self-coupling, fully neutral docking device of claim 1, wherein: a plurality of through grooves extending along the radial direction are axially distributed on the driven gear, and corresponding grooves are formed in the periphery of the transmission shaft; the torque-limiting connecting device comprises a set screw, an elastic piece and a ball, wherein the set screw, the elastic piece and the ball are assembled in the through groove, the bottom of the ball is embedded in the groove in the transmission shaft, and the elastic piece provides pretightening force for the ball under the action of the set screw.

3. The torque limited self-coupling fully neutral docking device of claim 2, wherein: the through groove is positioned on a fixed block fixed at one end of the driven gear.

4. The torque-limiting, self-coupling, fully neutral docking device of claim 3, wherein: the fixed block circumference sets up a plurality of archs, logical groove is located this arch in order to satisfy limit for torsion connecting device's assembly demand.

5. The torque-limiting, self-coupling, fully neutral docking device of claim 1, wherein: a communication part is also fixed on the substrate, and a through hole is arranged on the part of the upper end of the communication part, which covers the coupling part; the front end of the conductive pin is inserted into the through hole at the upper end of the communication part of the other butt joint device to realize the conduction of the communication part when the butt joint device is connected with the other identical butt joint device.

6. The torque limited self-coupling fully neutral docking device of claim 5, wherein: the conductive pin comprises a conductor and an insulator partially wrapping the periphery of the conductor, the absence of the insulator at the position of the peripheral part of the conductor enables the periphery of the conductor to have a first conductive potential and a second conductive potential which are distributed at intervals along the axial direction, and when two butting devices are connected in place, the first conductive potential and the second conductive potential are respectively positioned in the through holes of the communication parts of the two butting devices and are in contact conduction with the through holes.

7. The torque-limiting, self-coupling, fully neutral docking device of claim 6, wherein: the communication component comprises a plurality of bus bars for signal transmission, an annular contact cavity matched with a conductive pin on a butt joint device where the bus bar is located or a conductive pin on another butt joint device is formed at the upper end of each bus bar, and when the two butt joint devices are in butt joint in place, the conductive pin on any butt joint device can be in contact conduction with the contact cavities on the bus bars at different ends through a first conductive potential and a second conductive potential.

8. The torque limited self-coupling fully neutral docking device of claim 7, wherein: the communication part further comprises a fixed plate for realizing the fixation of the upper end of the bus bar, wherein the fixed plate is supported above the first coupling element and is provided with a positioning hole which corresponds to the contact cavity on the bus bar and is used for the conductive pin to pass through.

9. The torque limited self-coupling fully neutral docking device of claim 8, wherein: the communication unit also comprises a locking trigger device which is positioned at the bottom of the fixed disc and can send a signal for starting locking under the pushing of a guide pin on the other docking device.

10. The torque-limiting, self-coupling, fully neutral docking device of claim 9, wherein: the locking trigger device comprises a positioning plate fixed on the fixed plate, a first conducting plate and a second conducting plate which are fixedly assembled on the positioning plate, and a trigger hole communicated with the first conducting plate is further formed in the positioning plate; the connecting conductor which is assembled between the first conducting strip and the second conducting strip in a sliding way is provided with a conducting position and a separating position in the sliding process, when the connecting conductor is positioned at the conducting position, the connecting conductor is simultaneously contacted and conducted with the first conducting strip and the second conducting strip, when the connecting conductor is positioned at the separating position, the front end of the connecting conductor is separated and disconnected from the second conducting strip, and the rear end of the connecting conductor penetrates through the first conducting strip and extends into the trigger hole; the positioning plate is also provided with an elastic piece which enables the connecting conductor to be kept at a separation position, and the front end of the guide pin/the guide pin on the other butt joint device is inserted into the trigger hole to provide force for the connecting conductor to move from the separation position to the conduction position.

Images